A062950 C(H(n)), where C(n) is Chowla's function (A048050) and H(n) is the half-totient function (A023022).

-1, -1, 0, -1, 0, 0, 0, 0, 0, 0, 5, 0, 2, 2, 6, 0, 3, 2, 5, 0, 0, 2, 7, 5, 3, 5, 9, 2, 8, 6, 7, 6, 15, 5, 20, 3, 15, 6, 21, 5, 10, 7, 15, 0, 0, 6, 10, 7, 14, 15, 15, 3, 21, 15, 20, 9, 0, 6, 41, 8, 20, 14, 35, 7, 14, 14, 13, 15, 12, 15, 54, 20, 21, 20, 41, 15, 16, 14, 12, 21, 0, 15, 30, 10, 27, 21, 39, 15, 54, 13, 41, 0, 54, 14, 75, 10, 41, 21, 42, 14

Offset: 3

Author

Jason Earls, Jul 21 2001

Keywords

• sign

Crossrefs

Cf. A048050, A023022.

Programs

PARI

C(n)=sigma(n)-n-1; H(n)=eulerphi(n)/2; j=[]; for(n=3,150,j=concat(j,C(H(n)))); j